System and method for the detection and termination of fraudulent services

Abstract

A system is disclosed for the automatic detection of fraudulent activity on a transaction network, for which each transaction over the network has an associated identifier. In one embodiment, the system includes voice comparison means for comparing a first sampled voice of a user of a first transaction with a subsequently sampled voice of a user of a subsequent transaction having an identical identifier to that of the first transaction. Control means in the form of a voice-based fraud detection engine is provided for determining, from said comparison, a profile of user usage that is representative of a total number of different users of the associated identifier. In a preferred embodiment, the system also includes voice sampling means for sampling a voice of the user of the first transaction to generate a first voice sample.

Description

RELATED APPLICATIONS [0001] This application is a continuation of and claims the benefit of PCT / AU2003 / 000978 under 35 U.S.C. §§ 365 and 120, filed on Jul. 31, 2003 and published in English on Feb. 5, 2004, which in turn takes priority from GB 0217769.9 and GB 0222643.9, each of which are incorporated by reference.FIELD OF THE INVENTION [0002] The present invention relates to a system and method for the detection and termination of fraudulent activity over a transaction network through the use of voice sampling means. In particular, but not exclusively, the invention relates to a method and system for detecting fraudulent activity implemented over a mobile or landline telecommunications network. BACKGROUND OF THE INVENTION [0003] Telecommunications networks permit the reliable, rapid, and secure exchange of information for individuals and businesses on local, regional, and global scales. Such networks are fundamental to the operation of all electronic commerce (e-commerce) and mobil...

AI Technical Summary

Benefits of technology

[0016] The profile of user usage provides an indication of the number of different users associated with a single transaction identifier. It is a particular benefit of the present invention that there is no need to positively identify the voice of the user from the voice sample(s), but rather a determination is made as to whether the number of negative identifications (i.e. the number of voice samples which do not correspond to a previously stored voice print) suggests fraudulent use. This reduces the required sophistication level of the voice comparison means forming part of the system. The present invention stems from the realisation by the inventor, that the number of different users there are of an identifier can be used to provide an indication of whether there is fraudulent use of the identifier. A further benefit of the invention is that it

Problems solved by technology

The same problem is encountered with pre-paid call time.

The criminals are aided in this enterprise by the anonymity of telecommunications networks and the insecurity of their physical infrastructure.

Fraud is not only a serious problem for the operators of telecommunications networks, but also for the providers of services that make use of them.

In addition to the criminal acts of selling stolen services to third parties, the fraudulent use of credit and other payment cards for purchasing goods and services over

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